نتایج جستجو برای: dust protection

تعداد نتایج: 221058  

Extended abstract 1- Introduction Dust occurrences as natural events are common in arid, semi-arid and desert areas. Investigation of the dust with internal sources in the Khuzestan province including about 15 percent of the dust events coming to the region and the presence of the annual average of 50 times of the internal dust (with the concentration maximum of PM10 particles more than 8000p...

ایزانلو, مریم, طاهریان, الهام, کرمانی, مجید,

Background and objectives: Dust storm is a natural event that occurs in arid and semi-arid and There are many adverse consequences. according to the increased number and duration of dust storms and their effects on the environment and human health, present article is to Analysis of dust and dust storms in Iran,Investigation Internal and external origin of dust storms in Iran using sate...

Background: The release of metals from industrial factories is one of the most important sources of environmental pollution. The present study aimed to determine the concentration of heavy metals like cadmium (Cd), chromium (Cr), manganese (Mn), nickel (Ni), and lead (Pb) in dust around the cement factory. Methods: A total of 22 dust samples were collected from areas around the cement factory...

Journal: :محیط شناسی 0
قاسم عزیزی دانشیار اقلیم شناسی، دانشکدة جغرافیا، دانشگاه تهران علی اکبر شمسی پور استادیار اقلیم شناسی، دانشکدة جغرافیا، دانشگاه تهران مرتضی میری دانشجوی کارشناسی ارشد اقلیم شناسی، دانشکدة جغرافیا، دانشگاه تهران طاهر صفرراد دانشجوی دکترای اقلیم شناسی، دانشکدة جغرافیا، دانشگاه تهران

dust storm is a meteorological phenomenon common in arid and semi-arid regions. iran and particularly its west and south-west parts, periodically faces with the dust phenomenon and its problems. in this investigation two dust samples has been selected and studied that they has sustained over three days with visibility less than 1000m in west of iran. the first one occurred during 18 - 21 april ...

Journal: :MATEC web of conferences 2022

If electrical and non-electrical equipment used in underground mines susceptible to firedamp coal dust or other industries with explosion hazard is not proper selected for operating explosive atmospheres, they are likely generate an ignition of the atmosphere result events significant environmental material damages and, moreover, human victims. Therefore, it mandatory responsible persons reach ...

The analysis of dust hazard studies in southwest region of Iran in 22 years (1996-2017) Dust storms are natural hazards that mostly occur in arid and semi-arid regions and there are many harmful consequences. According to the topographic-climatic conditions in Iran and the significant increase in the number and severity of dust storms occurrence in recent decades, especially in the West and So...

حسین حمزه, نسیم, ذوالجودی, مجتبی, رنجبر, عباس, غفاریان, پروین, فتاحی, ابراهیم,

Dust particles consist of important aerosols and resulting in blowing strong winds on the surface of desert areas. These particles enter the atmosphere under the influence of different factors including: weather condition (wind, precipitation and temperature), land surface (topography, humidity level, roughness and vegetation), soil features (texture, density, composition and land use (agricult...

ذاکرین پور, زینب, رضائی, سمیه, عباس نژاد, احمد,

Dust is one of the environmental problems in Kerman city. Due to the major aspect of mineralogy in environmental studies, mineralogy and chemical studies of dust in different regions of the city performed by microscopic thin sections, x ray diffraction (XRD) and ICP-MS. In all areas of the city, minerals such as calcite, quartz, feldspar, pyroxene, micas, Jaffeite, gismondine and clay mineral w...

2012
T. Mariammal A. Amutha R. Sornaraj

Respiratory disorders are among the most common occupational diseases. In order to assess the respiratory status of the Construction and Sanitary workers this study was conducted. The construction and sanitary workers are exposed to harmful dust particles as well as pathogens regularly which affect their respiratory system. A standardized questionnaire designed, covering all the required data w...

Journal: :British journal of industrial medicine 1958
J MARKS D M JAMES T G MORRIS

To treat established silicosis it would appear to be necessary to inactivate the dust in the lungs in order to prevent further toxic action and permit the repair of what damage is reversible. The drug used would presumably need to reach phagocytic cells which have transported the dust from the alveoli to the interstitial tissue and lymph nodes. In the conditions of experimental silicosis, alumi...

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